JPH0453890Y2 - - Google Patents

Description

[Detailed explanation of the idea] "Industrial application field" The present invention relates to a surface grinder.

``Prior art'' In general, in a surface grinder, a workpiece is fixed on a movable table using an electromagnetic chuck or the like, and the movable table is rotated or reciprocated to be relative to a rotating grindstone. By moving the workpiece, the workpiece is brought into contact with the grindstone, and the surface of the workpiece is ground.

By the way, with such a surface grinder, it is difficult to automate the supply and discharge of workpieces, and
Since the surface of the movable table is a reference surface, if chips adhere to the movable table, the grinding surface of the workpiece will shift, and the parallelism will be impaired, especially when forming two parallel planes. It has some problems if you do it.

Furthermore, one way to increase grinding efficiency is to increase the relative speed between the workpiece and the grinding wheel. In the surface grinder mentioned above, the relative speed is the rotational speed of the grinding wheel and the passing speed of the workpiece ( In other words, the moving speed of the movable table is determined by the moving speed of the movable table, and the passing speed of the workpiece is limited in consideration of the grinding time, so there is also the problem that the relative speed cannot be set very high.

Therefore, conventionally, for example, as shown in FIG.
1b is rotated and the workpiece W is continuously fed between the two grindstones 1, 1a, and 1b by the linear guide 2, thereby simultaneously grinding both sides of the workpiece W to form two parallel planes. Grinding is carried out using a so-called double-headed grinder.

"Problems to be Solved by the Invention" The present invention is intended to solve the following problems in the conventional technology described above.

That is, the above-mentioned technology makes it possible to automatically supply and discharge the workpiece W, and
Double-sided grinding suppresses the influence of chips, but since the workpiece W is fed in a continuous state, there is no unground workpiece W between the two grinding wheels 1, 1a, 1b.
The problem is that the grinding and grinding workpiece W are mixed together, which may affect the grinding accuracy.Also, even with this technology, the relative speed between the grinding wheel and the workpiece is The problem is that the above-mentioned factors that limit the increase in relative speed have not yet been eliminated because the relative speed is determined by the rotational speed of the workpiece and the passing speed of the workpiece.

"Means for Solving the Problems" The present invention aims to provide a surface grinding machine that can effectively solve the above-mentioned conventional problems. a work supply unit that sends out a workpiece; a grinding unit that grinds the workpiece;
a workpiece discharging section that discharges the workpiece after grinding; a conveyance means that transfers the workpiece fed from the workpiece supply section to the grinding section, and also takes out the workpiece after grinding from the grinding section and transfers it to the workpiece discharge section; drive means for rotating the workpiece transferred to the grinding section, the conveyance means supporting the workpiece and rotating it in a plane parallel to the surface to be ground of the workpiece, and in a radial direction of the rotation. a plurality of carriers capable of reciprocating along the axis; an indexing mechanism that rotates the carriers intermittently to face the work supply section and the grinding section; The drive means is rotatably attached to the carrier and is engaged with a support member that holds the workpiece, and the drive means is engaged with the support member. It is characterized by consisting of a gear and a drive motor that can be engaged and disengaged from the gear.

"Operation" The surface grinder according to the present invention intermittently feeds the workpiece from the workpiece supply section, transports the workpiece to the grinding section by a carrier, and grinds the workpiece while rotating it by a drive means in the grinding section. After that, the workpiece is taken out from the grinding section by a carrier and discharged through the discharge section, which makes it possible to grind each workpiece and to adjust the setting range of the relative speed between the workpiece and the grinding wheel. It is intended to expand the

"Embodiment" An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In FIGS. 1 and 2, the reference numeral 3 indicates a surface grinder according to the present embodiment, and as shown in FIG. 3, the rotor R, which is a component of a vane pump, A cam ring C provided with a protrusion Ca is used as a workpiece W, and the end faces (sliding surfaces) of each are simultaneously ground.

First, the outline of the surface grinding machine 3 of this embodiment will be explained. The work feed section 4 feeds out the work W intermittently, and the grinding section 5 grinds the work W.
and a workpiece discharge section 6 that discharges the workpiece W after grinding.
Then, the workpiece W fed from the workpiece supply section 4 is transferred to the grinding section 5, and the workpiece W fed from the workpiece supply section 4 is transferred to the grinding section 5.
The conveying means 7 takes out the workpiece W after grinding and transfers it to the workpiece discharging section 6, and the driving means 8 rotates the workpiece W transferred to the grinding section 5. Support W.
A pair of carriers 9, 9a, 9b that are rotated in a plane parallel to the surface to be ground of the workpiece and can reciprocate along the radial direction of the rotation, and the carriers 9, 9a, 9b are intermittently rotated. By reciprocating the indexing mechanism 10 that is moved to face the work supply section 4 and the grinding section 5 and the carriers 9, 9a, 9b, the carriers 9, 9a,
The drive means 8 is rotatably attached to the carriers 9, 9a, 9b and comes into contact with the workpiece W. The drive motor 13 is comprised of a support member 12 that can be rotated, and a drive motor 13 that can be connected to and disengaged from the support member 12.

Next, to explain these details, as shown in FIG. 1, the work supply section 4 includes a magazine 14 in which works W are stacked in a slidable manner, and a magazine 14 that is perpendicular to the stacking direction of the works W in the magazine 14. The guide plate 15 is disposed so as to form a space between the magazine 14 and the work discharge portion of the magazine 14. The through hole 16a of the extrusion plate 16 is attached to the guide plate 15, and by moving the extrusion plate 16 along the guide plate 15, the extrusion plate 16 has a through hole 16a formed therein.
below the workpiece discharge section of the magazine 14 (the first
The actuator 17 is selectively positioned at a predetermined position above the carriers 9, 9a, and 9b.

In this embodiment, the grinding section 5 includes a rotary plate 18 made of synthetic resin having a rotating surface parallel to the rotating surfaces of the carriers 9, 9a, and 9b, and arranged in parallel above the rotating plate 18 at an interval. A grindstone 19 is provided.

Carriers 9, 9a, which constitute the conveyance means 7,
9b has a substantially rectangular planar shape,
A support hole 22 having the same shape as the through hole 16a of the extrusion plate 16 is formed at one end. These carriers 9, 9a, and 9b are attached to the rotating disk 20 provided between the work supply section 4 and the grinding section 5 along the radial direction of rotation of the rotating disk 20 and along the rotating disk 20. It is slidably attached via guide rods 21 provided symmetrically across the center of the workpiece supply section 20, and is attached so that its upper surface is at the same level as the upper surface of the guide plate 15 of the work supply section 4. further, when the support hole 22 is slid to the position closest to the center of the rotating disk 20, the supporting hole 22 is inserted into the rotating disk 2.
It is formed to have a length such that it protrudes a predetermined distance from the periphery of the workpiece W, and a thickness that is thinner than the workpiece W.

An annular support plate 23 is provided around the rotary disk 20 and is opposed to the lower surface of the carriers 9, 9a, 9b. The lower end of the inserted workpiece W is supported and the workpiece W is prevented from coming off from the carriers 9, 9a, 9b.

On the other hand, a drive shaft 24 is integrally provided at the center of rotation of the rotating disk 20, and the indexing mechanism 10 is connected to the drive shaft 24 via the drive shaft 24. The indexing mechanism 10 uses a stepping motor 25 in this embodiment, and rotates the rotating disk 20 by 180 degrees.
The respective carriers 9, 9 are rotated intermittently.
a and 9b are made to alternately face the work supply section 4 and the grinding section 5.

As shown in FIGS. 1 and 2, the workpiece discharge section 6 is provided at a position facing the workpiece supply section 4, and includes a discharge chute 26 disposed below the support plate 23; As shown in FIG. 1, an elevating plate 27 is formed by separating a part of the support plate 23, and the elevating plate 27 is raised and lowered,
an actuator 28 whose upper surface selectively matches the upper surface of the support plate 23 and the upper surface of the discharge chute 26; and an actuator 28 which faces the discharge chute 26 with the elevating plate 27 in between, as shown in FIG. In a state where the plate 29 and the elevating plate 27 are located at the lowest position, the removing plate 29
and an actuator 30 that moves the ejector over the elevating plate 27 toward the ejection chute 26.

The support member 12 constituting the drive means 8 is formed into a disk shape, and has a gear 31 formed on its outer peripheral surface and a support hole 22 for the carriers 9, 9a, 9b in the center. Through holes 32 having the same shape are formed. Then, the support member 12
As shown in FIG. 4, each carrier 9, 9a,
It is rotatably mounted inside the carrier 9b, and as shown in FIG. ing. Of these gears 33 to 35, the gear 35 located toward the center of the rotary disk 20 is integrally provided with a shaft 36 that protrudes from the upper surface of the carriers 9, 9a, and 9b. The drive motor 13, which is another component of the drive means 8, is mounted via an actuator 38 in a casing 37 provided above the carriers 9, 9a, 9b and near the grinding section 5. At the same time, by being raised and lowered by the actuator 38, the rotation shaft 39 is engaged with and disengaged from the shaft 36 of the gear 35, and the rotation shaft 39 is moved up and down by the actuator 38.
35 so that it can be engaged with and detached from the support member 12. Furthermore, the actuator 38
and the drive motor 13 are connected to the casing 3, respectively.
7 and is slidably supported by a guide rod 40 provided parallel to a line connecting the centers of the rotating disk 20 and the grindstone 19.

On the other hand, the rotating shaft 39 of the drive motor 13 has
an eccentric cam 42 formed with a spline 41 and rotatably attached to the casing 37;
By rotating the eccentric cam 42, the eccentric cam 42 is slidably fitted into the eccentric cam 42.
The casing 37 is reciprocated in the direction along the guide rod 40 by an amount of eccentricity.

The support member 12 is equipped with gears 33 to 35.
By being rotationally driven by the drive motor 13 via, it engages with the protrusion Ca of the workpiece W,
The workpiece W is rotated.

The transfer mechanism 11 is provided between the casing 37 and the grinding machine main body 3a, and as shown in FIG. 1, is provided parallel to the guide rod 40 and supports the casing 37 in a slidable manner. and an actuator 44 that is interposed between the grinding machine body 3a and the casing 37 and moves the casing 37 along the guide rod 43, and the engagement between the drive motor 13 and the shaft 36 is By moving the casing 37, the carrier 9,
By reciprocating the carriers 9a and 9b toward the grinding section 5, the work W held by the carriers 9, 9a, and 9b is moved forward and backward relative to the grinding section 5.

Next, the operation of the surface grinder 3 of this embodiment configured as described above will be explained as follows.

First, the magazine 14 loaded with the workpieces W is attached to the workpiece supply section 4, and the workpiece W located at the lowest end is inserted into the through hole 16a of the extrusion plate 16. 27 is raised, and the drive motor 13 is moved upward and to the left in FIG. 1 to be in a standby state, while the rotary plate 18 and the grindstone 19 are kept rotating.

As a result, the actuator 17 is actuated to move the push-out plate 16 toward the carrier 9a, and the through-hole 16a of the push-out plate 16 is positioned above the support hole 22 of the carrier 9a, thereby moving the workpiece W into the magazine. 14 and drop into the support hole 22, and then,
The push-out plate 16 is moved back to its original position and placed on standby.

Next, the indexing mechanism 10 is operated to rotate the carriers 9, 9a, and 9b by 180 degrees so that the carrier 9a into which the workpiece W has been inserted is opposed to the grinding section 5, and then the drive motor 13 is rotated and the The drive motor 13 is lowered by the actuator 38 and its rotating shaft 39 is engaged with the shaft 36 of the gear 35. By this operation, the support member 12 is moved to the workpiece W.
The workpiece W is brought into rotation while being engaged with the workpiece W.

By moving the casing 37 toward the grinding section 5 by the actuator 44 of the transfer mechanism 11, the drive motor 13 and the carrier 9a engaged with the drive motor 13 are also moved toward the grinding section 5. As a result, the workpiece W is inserted between the rotary plate 18 and the grindstone 19 together with one end of the carrier 9a, and grinding of the workpiece W is started.

While such a grinding operation is being performed, the workpiece W is rotated by the driving means 8, and
Based on the action of the eccentric cam 42 provided between the drive motor 13 and the casing 37, the casing 3
7, the drive motor 13 and carrier 9a are reciprocated in the length direction of the guide rod 43, so that the grindstone 19 is reciprocated in the radial direction. Therefore, a large relative speed is given between the workpiece W and the grindstone 19.

On the other hand, while the above-described grinding operation is being performed, a new workpiece W is mounted on the other carrier 9b in the same procedure as the above-described operation.

When the grinding operation is completed, the actuator 44 is operated again to move the drive motor 13, casing 37, and carrier 9a to the rotating disk 20.
After withdrawing the workpiece W from the grinding section 5 by moving it backward toward the center of the grinding section 5, the drive motor 13 is raised to release the engagement between the rotating shaft 39 and the shaft 36,
Next, the rotary disk 20 is rotated by the indexing mechanism 10 so that one carrier 9a faces the work supply section 4 and the other carrier 9b faces the grinding section 5.

Here, for the other carrier 9b,
With the operation of the transfer mechanism 11 and the drive means 8, the above-described grinding operation is carried out, and one carrier 9a
, the following evacuation operation is performed.

That is, when one carrier 9a is returned to the workpiece supply section 4, the ground workpiece W held by the carrier 9a is positioned on the lifting plate 27 of the workpiece discharge section 6. From this, the elevating plate 27 is lowered by the actuator 28 to the same level as the ejection chute 26, and after the workpiece W on the upper part thereof is opposed to the removal plate 29, the removal plate 29 is ejected by the actuator 30. By moving the work toward the chute 26, the workpiece W on the lifting plate 27 is
is pushed out to the discharge chute 26 and discharged.

After such ejection operation is completed, the elevating plate 27 is raised to the same level as the support plate 23, and the above-described operations are repeated, so that the workpieces W in the magazine 14 are continuously ground. be done.

As described above, the surface grinding machine 3 according to this embodiment
A series of operations of supplying, grinding, and discharging the workpiece W are performed continuously to enable automatic supplying and discharging of the workpiece W.

During the grinding operation, the workpieces W are supplied to the grinding section 5 one by one and ground.
A situation in which unground workpieces W and ground workpieces W are mixed in the grinding section 5 is avoided, and the depth of cut during grinding is maintained at an appropriate level. Further, since the workpiece W is held in a constant positional relationship with respect to the center of rotation of the grindstone 19 and the workpiece W itself is rotated for grinding, the grinding time and the grindstone 19 are
The setting range of the relative speed between the workpiece and the workpiece W is greatly expanded, and sufficient grinding operation is ensured.

Furthermore, in this embodiment, during the above-described grinding operation, the eccentric cam 42 provided between the drive motor 13 and the casing 37 causes the carriers 9, 9a, 9b to move toward the grindstone 19 as the drive motor 13 rotates. Since the grinding wheel 19 can be reciprocated in the radial direction of rotation, the relative speed between the workpiece W and the grinding wheel 19 can be further increased, and by appropriately setting the amount of eccentricity of the eccentric cam 42,
Since the workpiece W can be moved over the entire grinding surface of the grindstone 19, uneven wear of the grindstone 19 is suppressed.

Therefore, highly accurate grinding is performed by these synergistic effects.

It should be noted that the shapes and dimensions of each component shown in the above embodiments are merely examples, and can be variously changed based on the type of shape of the workpiece W to be ground, design requirements, etc.

For example, in the embodiment described above, the engagement between the support member 12 and the work W is performed by the protrusion Ca formed on the cam ring C, which is the work W, and the recess of the support member 12. Instead, a clamping device that grips the workpiece W only when it is opposed to the grinding section 5 may be incorporated into the support member 12.

Furthermore, although an example has been shown in which one each of the work supply section 4, the grinding section 5, and the work discharge section 6 is provided, and a pair of carriers 9 are provided, for example, an integer multiple of these may be provided around the rotating disk 20. , simultaneously supplying and transporting multiple workpieces W,
It can also be ground and drained.

Further, an example has been described in which the transfer mechanism 11 is provided between the casing 37 and the grinding machine main body 3a, and the grinding in the grinding section 5 is single-sided grinding. Board 2
0, the rotary plate 18 of the grinding section 5
It is also possible to perform double-sided grinding by replacing the grindstone with a grindstone.

"Effect of the invention" As explained above, the surface grinding machine according to the invention includes a work supply section that feeds the work intermittently,
A grinding section that grinds the workpiece, a workpiece discharging section that discharges the workpiece after grinding, and a workpiece discharge section that transfers the workpiece fed from the workpiece supply section to the grinding section, and takes out the workpiece after grinding from the grinding section and discharges the workpiece after grinding. The transport means is equipped with a transport means for transporting the workpiece to the discharge section, and a drive means for rotating the workpiece transported to the grinding section, and the transport means supports the workpiece and rotates the workpiece in a plane parallel to the surface to be ground of the workpiece. a plurality of carriers that are rotated and capable of reciprocating along the radial direction of the rotation; an indexing mechanism that rotates the carriers intermittently to face the work supply section and the grinding section; By moving the workpiece, the workpiece supported by the carrier is moved forward and backward toward the grinding section. , which is characterized by comprising a gear meshed with the support member and a drive motor that is engaged with and disengaged from the gear, and provides the following excellent effects.

A series of operations of supplying, grinding, and discharging the workpiece are performed continuously to enable automatic supply and discharge of the workpiece.

During the grinding operation, the workpieces are fed one by one to the grinding section for grinding, thereby avoiding a mixture of unground workpieces and ground workpieces in the grinding section, and reducing the depth of cut during grinding. The amount, etc. can be maintained at an appropriate level.

During grinding, the positional relationship between the workpiece and the center of rotation of the grindstone is maintained constant, and the workpiece itself is given rotation, which greatly expands the setting range of the grinding time and relative speed between the grindstone and the workpiece. I can do it.

Due to the synergistic effect of the above, highly accurate grinding can be performed continuously.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is a vertical cross-sectional side view, Figure 2 is a plan view, and Figure 3 is an external view of a workpiece to be ground in one embodiment. FIG. 4 is an enlarged cross-sectional view of a portion of FIG. 1, and FIG. 5 is a schematic diagram showing an example of a conventional surface grinder. 3...Surface grinder, 3a...Grinding machine body, 4...
... Work supply section, 5 ... Grinding section, 6 ... Work discharge section, 8 ... Transport means, 9, 9a, 9b ... Carrier, 10 ... Indexing mechanism, 11 ... Transfer mechanism, 1
2... Support member, 13... Drive motor, 16...
Extrusion plate, 16a... Through hole, 18... Rotating plate, 19... Grindstone, 20... Rotating disc, 22...
Support hole, 26...Discharge chute, 27...Elevating plate, 29...Exclusion plate, 31...Gear, 32...Through hole, 33-35...Gear, 41...Spline, 42...Eccentric cam, W...Work, R...Rotor, C...Cam ring, Ca...Protrusion.

Claims (1)

[Scope of utility model registration request] a workpiece supply section that intermittently feeds out the workpiece; a grinding section that grinds the workpiece; a workpiece discharge section that discharges the workpiece after grinding; The transport means takes out the work after grinding from the grinding section and transfers it to the work discharge section, and the drive means rotates the work transferred to the grinding section, and the transfer means supports the work and transfers the work to the work discharge section. a plurality of carriers that are rotated in a plane parallel to the surface to be ground of the workpiece and can be reciprocated along the radial direction of the rotation; and the carriers are intermittently rotated and moved to the workpiece supply section and the grinding section. It consists of an indexing mechanism that faces each other, and a transfer mechanism that moves the workpiece supported by the carrier forward and backward toward the grinding section by reciprocating the carrier, and the drive means is configured to rotate the carrier. A surface grinding machine comprising: a support member attached to the workpiece to hold the work; a gear meshed with the support member; and a drive motor connected to and disengaged from the gear.